In case of esthetic restorative procedure with zirconia restoration, we have to use resin cement because of not only just for retention but also esthetic reason. In such a clinical situation, we have to consider two bonding interfaces, one is tooth surface to resin cement and the other is zirconia surface to resin cement. There is well established bonding protocol between tooth surface to resin cement, but bonding protocol of zirconia surface to resin cement is still controversial. In scientific point of view, there are two mechanism for bonding of zirconia restoration.. One is mechanical retention and the other is chemical adhesion. However, we have three different options for bonding of zirconia restoration in clinical situation; 1) Tribo-chemical coating with silica and silane coupling agent 2) Zirconia primer with phosphate chemistry 3) Self-adhesive resin cement with phosphate chemistry.

After extraction of tooth, alveolar ridge resorption is inevitable in most cases. Clinicians confront with horizontal and vertical resorption of alveolar bone. Without massive amount of bone and soft tissue graft, dental implant will be placed apically to gain stability. In those cases, not only white esthetic part, but also pink esthetic part should be restored with pink porcelain. The margin of prosthesis should be located apically to reproduce natural look with adjacent teeth. However, when the margin is located apically, it is always hard to remove remaining cement, thus complications may arise. In this report, a novel design of implant prosthesis is introduced to solve those issues. The novel design is consisted of zirconia framework with pink porcelain and separate crowns on top of the framework. It eliminates the possibility of cement remnants by bringing the crown margin coronally. Pink esthetic part is incorporated in abutment part instead of crown part and the screw hole is covered with separate crowns.

There are several factors affected fractures of full contour zirconia (FCZ) dental prosthesis in laboratory process. First, residual moisture can cause zirconia cracks. Complete dry is requisite before zirconia sintering to prevent zirconia cracks. Second, slow cooling rate is essential to prevent cracks during zirconia sintering process. Cracks in bridge pontic area, thick dental implant prosthesis can be prevented by slow cooling rate such as 3 degree Celsius per minute during zirconia sintering. Third, slow heating rate and slow cooling rate during staining and glazing procedure is necessary to inhibit thermal shock of sintered dental zirconia. Lower preheat temperature of porcelain furnace is recommended. Finally, using diamond disc to open embrasure can lead cracks.

가지런한 치열을 얻기 위해 교정 치료는 치아 보존적인 의미에서 단연 First choice가 일 수 밖에 없다. 그러나 왜소치나 치아 크기의 불균형인 경우, 변색 치아나 파절, 심한 마모 치아인 경우 교정만으로는 심미적으로 완성도 높은 결과를 가져올 수 없다. 모든 치료에서 그러하지만, 특히 심미 치료에서는 치아 교정과 보철 치료, 혹은 치주 치료 및 임플란트등 항상 통합적인 진단과 치료계획이 필요한 경우가 많다. 그리고 다양한 치과 분야의 협진 진료가 필요한 환자에서는 안모와 치아의 심미적 만족뿐 아니라 기능적인 교합관계를 이룸으로써 장기간 안정적이며 조화로운 상태가 유지될 수 있는 치료가 전제되어야 한다. 본 증례는 전치부와 소구치에 cross bite가 있고, 상악 우중절치 절단에 마모가 있는 37세 여성 환자에서 교정과 라미네이트 수복치료를 동반한 경우이다. 치아교정을 통하여 전체적인 치아 위치를 재구성하여 기능교합을 이루었고, 최소한의 치질삭제로 라미네이트 수복치료를 함으로써 전치부 심미를 회복하였다. 최종 보철물을 장착하고 2년간 주기적인 follow up통해 예후를 관찰중이며, 부정교합의 재발이나 보철물 파절은 현재까지 관찰되지 않았다.

In recent years, perhaps the biggest driver in new material development is the desire to improve crown and bridge esthetics compared to the traditional PFM or all-metal restorations. As such, zirconia, leucite-containing glass ceramic and lithium disilicate glass ceramic have become prominent in the dental practice. Each material type performs differently regarding strength, toughness, ease of machining and the final preparation of the material prior to placement. For example, glass ceramic are typically weaker materials which limits its use to single-unit restorations. On the other hand, zirconia has a high fracture toughness which enables multi-unit restorations. This material requires a long sintering procedure which excludes its use for fast chair side production. Developed hybrid material of CAD/CAM is contained nano ceramic elements. This new material, called a Resin Nano Ceramic is unique in durability and function. The material is not a resin or composite. It is also not a pure ceramic. The material is a mixture of both and consists of ceramic. Like a composite, the material is not brittle and is fracture resistant. Like a glass ceramic, the material has excellent polish retention for lasting esthetics. The material is easily machined chair side or in a dental lab, polishes quickly to an esthetic finish and if necessary, can be useful restoratives.

This study is about the basis of satisfactions by patients : One is 'what factors of the marketing by dental medical service have an effect on consumers dental clinic' The other is 'what is the most important part when consumers choose the dental medical ser Seoul and Gyeonggi area unintentionally. Finally 446 people were analyzed. 6 general questions, 5 selective form questions when consumers choose the dental service, 11 satisfactions questions after treating and thought of reuse the dental service 6 (Likert scale) questions. Whether the choice of hospital dental marketing by dental analysis, both male and female hospital medical marketing and use of selected highly suggests that it does not respond. The resulting satisfaction analysis using the Hospital Dental Marketing consumer access to medical care, and then, a full explanation, comfort, quality and level, health care costs, treatment management, and symptom improvement were higher satisfaction with the item, select the dental healthcare after the analysis of the marketing of recycled doctors are otherwise subject the person selected from all entries equal to or higher than the average consumer satisfaction showed a higher medical doctor also higher reuse. Consequently, Through the use of marketing to choose the best dental healthcare need to providing quality care.